Rock-drill.



PATENTED JULY 21.,.1903.

P. REINHALTER.

ROCK DRILL. APPLIomjIoN FILED JULY 1o, 1002.

y H0 MODEL.

.n.n.. JN.

I To all whom t may concern:

UNITED STATES vPatented July 21, 190e.

PATENT OFFICE.

TO QUINOY ELECTRIC DRILL COMPANY, A CORPORATION OF NEW JERSEY.

ROCK-DRILL.

SPEIFICATION forming part Of Letters Patent N. 734,364, dated July 21,1903. Application filed July 10l 1902. Serial No. 115,011. (No model.)

Be it known that I, PETER REINHALTER, a citizen of the United States,residing in the city and county of Philadelphia, State of Pennsylvania,have invented a new and useful Improvementin Rock-Drills, of which the.following is a specification.

My invention consists of a new construction of a rock-drill which isespecially adapted to be operated by means of power taken from anelecmotors because ofthe costly and curnloersome appliances usuallynecessary to transp mit the power from the motors to the oper-, ativeparts of the* drills.. By my invention.'l such difiiculties aredispensed with and Iam;

enabled to place the source of power at any required distance (it may bethousands o f feet)from the rock-drill, andthe power be ing transmittedby means of iiexible and extensible conductors all the movements ofAthe, drill are conveniently and economically ac mit the entrance andimovement of the pins 14.-. The shoulder 19 within the head 15 has l incontact therewitha ring 20, the surface of commodated.

To the above ends my invention consists in the novel arrangement ofsprings adapted' to coact with the reciprocating drill-rod,l vpro-1vision being xnad'e for rendering said springs readily accessible andfor permitting said'I vention, certain of the parts being shown inelevation. Fig. 2 represents a longitudinal sectional View of Fig.1,.certain of the parts being shown in elevation. Fig. 3 represents asectionl on line Fig. 1, certain of the parts being shown in elevation.

Similar numerals of reference indicate corresponding parts in theligures Referring to the drawings, l designates a rock-drill, the sameconsistingof a cylinder 2, having the nose-piece 3, through which thelower extremitya of' the drill-rod 5 passes, the same having a socket 6therein for the reception of the shank of the tool.

7 designates a liexible shaft of any suitable construction, which iscaused to rotate, preferably, by an electric or other suitable motor,said shaft being rotatably mounted in the bear ings 8 and carrying thebeveled gear 9, which is adapted to mesh with the beveled gear 10, whichis mountedonthe crank-shaft ll,which rotates in suitable bearings and isprovided with the cranks 12, fromwhich extend the connecting rods orlinks 13, in which are or other engagement with the cross-head 15,

-thelatter havingthe oppositely-located extensions 16 and 17,.which areadapted to slide Within the cylinder 2, the latter being provided withoppositely-located slots 18 to perwhich is provided' with suitablebearings for the .balls 21, which are held in position by the ring 22,with which contacts oneextremity of the spring 23, the other end of thelatter contacting with thehead24, which is in engagement with theextremity of the drill-rod 5and is held in position withrespect-theretobythe pin or plug 25,*J Y if i 26 designates a closureforthe vupper portion of the head or cap 24, with which engages the member27 of thedevice by which the desired rotation ot' the drill-rod 5 is ef-95 other or opposite `ball-bearing device, which roo contacts with thecontiguous shoulder of the cross-head 15, said ring being grooved forthe reception of the balls 29, which are held in position by thecontiguous ring 30, against which contacts an extremity of the spring31, the opposite end thereof abutting against the abutment or shoulder32 of the drill-rod 5, which latter, it will be noted, passes freelythrough the head 15, while the upper and lower extensions 16 and 17thereof are freely guided in the cylinder 2, which is supported withinthe casing 33, which has attached thereto the extension 34:, withinwhich are contained the cranks, pins, connecting-links, and theiradjuncts.

The operation is as follows: The rotation of the liexible or other shaft7 is ilnparted, through the medium of the beveled gears 9 and 10, to thecrank-shaft 1l and thence by the connections 13 and 14 to the cross-head15, wherefrom it will be apparent that the reciprocation of thecross-head 15 through the medium of the springs 23 and 3l, whoseopposite extremities contact, respectively, with the ball-bearingdevices carried within the cross-head and with the abutments formed bythe parts 32 and 24, will cause a positive and effective reciprocationto be imparted to the drill-rod 5, while theimpact of the blowstherefrom can be readily transmitted to the desired point through themedium of the desired tool employed. y

It will of course be understood that the drill-rod 5 may be rotated inany suitable or desired manner, as will be familiar to those skilled inthis art.

I desire to call especial attention to the feature of mounting thejuxtaposed extremities of the springs 23 and 3l, respectively, upon theball-bearing devices carried within the cross-head, since it will beseen that by this construction the rod 5 will be permitted to be rotatedto the desired extent without undue friction and that by my novelconstruction the principal operative parts can be readily assembled ordisconnected at all times for the purpose of inspection or repairs. Itwill also be noted that by the employment of the oppositely-locatedsprings 31 and 23 and by reason of the fact that the reciprocatingmovements of the drill-rod 5 are imparted thereto in each direction bysaid springs said drill-rod is cushioned during its movements in bothdirections, whereby the most eective results are attained and the lifeof the apparatus is prolonged, as is evident.

While I have described my invention as being particularly applicable tobe used in connection with an electric motor, it will of course beunderstood that I do not limit myself thereto, as other equivalent formsof motors may be employed without departing from the spirit of myinvention.

It will be apparent that various changes maybe made by those skilled inthe art which will come within the scope of my invention, and I do not,therefore, desire to be limited in every instance to the exactconstruction I have herein shown and described.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In a rock-drill, a cylinder, a cross-head therein and havingoppositely-located extensions, a drill-rod passing loosely through saidcross-head, means carried by said cross-head and projecting throughslots in the casing for reciprocating the cross-head, abutments uponopposite portions of said drill-rod, ball-bearing devices carried uponopposite portions of said cross-head and received within saidextensions, springs interposed between said abutments and ballbearingdevices, and means for reciprocating said cross-head.

2. In a rock-drill, a cylinder, a cross-head therein, extensions oneither side of said cross-head, ball-bearing devices located within saidextensions, abutment-s upon opposite portions of the drill-rod, adrill-rod passing loosely through said cross-head, springs interposedbetween said abutments and balllbearing devices, and means forreciprocating said cross-head.

3. In a rock-drill, a cylinder, a cross-head therein a drill-rod passingthrough said crosshead, abutments on opposite portions of saiddrill-rod, ball-bearing devices in contact with said cross-head, springsinterposed between said abutments and ball-bearing devices, openings insaid cylinder, pins engaging said cross-head and projecting from saidopenings, a crank-shaft, and connections from said crank-shaft to saidpins.

4:. In a rock-drill, a cylinder, a cross-head therein, a drill-rodpassing through said crosshead, abutments on opposite portions of saiddrill-rod, ball-bearin g devices carried by said cross-head, springsinterposed between said abutments and ball-bearing devices, openings insaid cylinder, pins in engagement with said cross-head and projectingthrough said openings, a crank-shaft having a plurality of cranksthereon mounted on opposite sides of said cylinder, and links common tosaid crank-shaft and pins.

5. In a rock-drill, a flexible shaft, suitable bearings therefor, acrank-shaft, gearing common to said fiexible shaft and crank-shaft, acylinder adjacent to which said crank-shaft is mounted, the cranks ofthe latter being located oppositely with respect to said cylinder, across-head in the latter having oppositelylocated extensions,ball-bearing devices located within said extensions, pins extending fromsaid cross-head, links connecting said pins and cranks, a drill-rodpassing through said cross-head, abutments on opposite portions of saiddrill-rod, and springs interposed between said abutments and theball-bearing devices of the cross-head.

6. In a rock-drill, a liexible shaft, suitable bearings therefor, acrank-shaft, gearing common to said flexible shaft, a crank-shaft, acylinder adjacent to which said crank-shaft IOO IIO

is mounted, the cranks of the latter Ybeing located oppositely withrespect to said cylinder, a cross-head in the latter, said cylinderhavingoppositely-disposed slots and a cross-head havingoppositely-located extensions covering the same, pins extending fromsaid crosshead and working insaid slots, links connecting said pins andcranks, a drillrod passing through. said cross-head, abutments onopposite portions of said drill-rod, and springs interposed between saidabutments and cross-head, in combination with ballbearing devicescarried by said cross-head and adapted to contact with the juxtaposedends of said springs, whereby said drill-rod can be rotated according torequirements with a minimum amount of friction.

7. In a rock-drill, a cylinder having oppositely-located slots, across-head movable Within'said cylinder, a drill-rod mounted toreciprocate loosely through said cross-head, ball-bearing devices uponopposite sides of said cross-head, abutments upon opposite portions ofthe drill-rod, springs interposed between said ball-bearing devices andsaid positely-disposed extensions movable Within said cylinder oppositesaid slots, ball-bearing devices on said cross-head, abutments on 'Iopposite portions of the drill-rod, a drill-rod mountedto reciprocateloosely through said cross-head, independent springs acting upon saidball-bearing devices and engaging said abutments on the drill-rod, pinscarried by the cross-head and projecting through said slots, and meansconnected with the said pins for reciprocating the cross-head.

PETER REINHALTER.

Witnesses:

JOHN A. fWIEDERSHEIM, E. HAYWARD FAIRBANKS.

